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Lesson · Grade 1 · Mathematics

Block Graphs: Which Row Is Longer?

  • Grade 1
  • Mathematics
  • 1 min
  • British Columbia
  • BC1-MA-18

Ten children each put one block in the row for their favourite fruit, making a concrete graph with 6 apple blocks and 4 banana blocks lined up from the same start. Matching one apple block to each banana block leaves 2 apple blocks without a match, so the apple row has 2 more, and counting both rows checks it.

Concept: A concrete graph: one object for each, then compare the rows

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In one sentence

The question this lesson answers

These children pick a favourite fruit: apple or banana.

Each child puts one block in their fruit's row.

Transcript

What the lesson says

These children pick a favourite fruit: apple or banana.

Each child puts one block in their fruit's row.

A graph made of blocks is a concrete graph.

Both rows start at the same line.

Which row is longer? The apple row!

But how many more blocks does it have?

Match one apple block with one banana block.

Two apple blocks have no match.

So the apple row has two more.

Count to check. One, two, three, four, five, six.

Now the bananas. One, two, three, four.

Six is two more than four.

Match the rows, and the extras show how many more.

Curriculum

Where this fits

British Columbia, Grade 1

Mathematics, Data and probability: concrete graphs, using one-to-one correspondenceBC1-MA-18

Next: How likely is it? Never, sometimes, always

The outcomes and strands follow the British Columbia curriculum.

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